A 90-second read before checkout.
Memrith is a continuity layer for AI — a local, editable memory of your work and thought that survives switching providers. Two practical things to know before you spend money: you'll connect your own AI provider API key (which is why your memory stays portable across vendors), and the first launch will show a one-time security warning that's easy to clear if you know to expect it. This page walks through both.
1 You'll need an AI provider API key
Memrith is BYOK — bring your own key. You connect Memrith to an AI provider you already use (or sign up for one), paste your API key into Settings, and your AI usage is billed directly by that provider. Memrith never takes a cut and there's no monthly Memrith fee.
AI usage is billed by your chosen provider based on actual tokens used. Personal journaling tends to be light usage, but exact cost depends on the provider and model you pick — set a hard spending cap in the provider's dashboard if you want a guarantee. You'll need a key before Memrith is useful, so grab one before or right after purchase.
The deeper reason Memrith is BYOK: your memory survives switching providers. Why this matters →
Supported providers
All three providers bill you directly based on actual usage. Pricing, free credits (if any), and tier availability are set by the provider — check their pricing page before signing up.
You can switch providers any time in Settings → AI Provider. Keys are stored in your OS keychain — Memrith never logs or transmits them anywhere except direct API calls to the provider you chose.
2 How installation works
After purchase, Polar emails your license key instantly and links you to the download. Pick your OS below for the exact steps — including the security prompt you'll see on first launch.
Step 1 — Download
Click the download link in your purchase email from Polar. You'll get
Memrith-1.X.Y.dmg (about 70 MB).
Step 2 — Drag to Applications
Double-click the DMG. A window opens showing Memrith.app and an Applications shortcut. Drag Memrith.app onto Applications.
Step 3 — First launch (the important bit)
Because Memrith isn't sold through the Mac App Store, macOS Gatekeeper will block it the very first time you try to open it. This is normal and easy to clear:
To open Memrith the first time on macOS Sonoma / Sequoia (14+):
- Open System Settings → Privacy & Security.
- Scroll all the way down. You'll see "Memrith was blocked to protect your Mac."
- Click Open Anyway next to that message.
- Confirm in the prompt that appears.
On older macOS (13 and earlier):
- Right-click (or control-click) Memrith.app in your Applications folder.
- Choose Open from the menu.
- A dialog appears asking if you're sure. Click Open.
Either way: you only need to do this once — every future launch works with a normal double-click.
Step 4 — No Python to install
Memrith bundles its own private Python runtime inside the app, so there's nothing else to set up — you won't be asked to install Python.
Step 5 — Paste your license key + API key
Memrith starts a one-time setup wizard. Paste your Memrith license key (from the purchase email), then paste your AI provider API key from Step 1 above. Done — Memrith is ready.
Full installation guide with troubleshooting: Memrith FAQ
Step 1 — Download
Click the download link in your purchase email from Polar. You'll get
Memrith-1.X.Y-Setup.exe (about 25 MB — includes everything
Memrith needs to run, no separate downloads required). Save it
somewhere convenient like your Downloads folder.
Step 2 — First launch (the important bit)
Because Memrith is a new indie app and hasn't accumulated millions of downloads yet, Windows SmartScreen will warn you the first time you run the installer. This is normal for any new app from a small publisher and easy to clear:
To install Memrith the first time:
- Double-click
Memrith-1.X.Y-Setup.exe. - If you see a blue "Windows protected your PC" dialog, click More info (small link in the dialog).
- A Run anyway button appears. Click it.
- The installer opens. Click Next through the welcome screen, then Install.
- When the installer asks to add the WebView2 runtime (Win10 only — Win11 has it built-in), let it run silently. Takes about 30 seconds.
No admin rights needed. Memrith installs to your user
folder (%LOCALAPPDATA%\Programs\Memrith) — same pattern as
Chrome and VS Code. No UAC prompt, works on standard accounts.
Step 3 — Launch Memrith
A Memrith shortcut is added to your Start Menu and Desktop. Double-click either one to launch. The first launch takes about 5 seconds while Memrith finishes setting itself up; subsequent launches are instant.
No Python install required. Memrith bundles a private Python runtime inside the installer. You don't need to install Python separately or configure any PATH variables.
Step 4 — Paste your license key + API key
Memrith starts a one-time setup wizard. Paste your Memrith
license key (from the Polar purchase email — looks like
MEMRITH-XXXX-…), then paste your
AI provider API key from your chosen provider
(Anthropic, OpenAI, or OpenRouter — see the Step 1 section above).
Done — Memrith is ready.
3 System requirements
- macOS 11 (Big Sur) or later, Apple Silicon (M1 or newer) — Intel Macs are not supported, and Intel support is not currently planned
- Windows 10 or later
- ~500 MB free disk space (more if you enable on-device semantic search, which downloads a ~130 MB local AI model)
- Internet connection — only for direct calls from your machine to your chosen AI provider. No Memrith account, no Memrith server.
4 Quick questions you might have
What if I change my mind?
Memrith ships with a 60-day money-back guarantee. If something doesn't work for you, email support@memrith.com within 60 days of purchase and we'll refund in full — no questions asked. Polar processes the refund back to your original payment method. Full terms in the refund policy.
Will I be charged for AI usage by Memrith?
No. Memrith is a one-time purchase. AI calls are billed by the provider whose key you paste — Anthropic, OpenAI, or OpenRouter. Memrith never sees that money. Actual cost depends on the provider, model, and how much you use Memrith; check your provider's pricing page and set a spending cap in their dashboard if you want a hard upper bound.
Is my data private?
Yes. All entries, memories, and uploads stay in
~/Library/Application Support/Memrith/ (macOS) or
%APPDATA%\Memrith\ (Windows). The only network traffic is
direct calls from your machine to your chosen AI provider. No Memrith
server, no Memrith account, no telemetry by default
(opt-in crash reporting is the one exception, and it scrubs API keys and
file paths before sending). Full details in the
privacy policy.
Can I install it on more than one computer?
Yes — your license activates on up to 2 machines. You can deactivate one from Memrith's Settings to free a slot, or reach out to support@memrith.com if you need more.
Ready to get started
$9.99 one-time. Instant license delivery. 60-day money-back guarantee.
Secure checkout via Polar.
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